My question, which I'm sure has been asked before: Why are DoW's own prices so much higher than other "middle-man" online retailers?

We determine what we think is a fair price for our games and set an MSRP (Manufacturers Suggested Retail Price) which is the price you see for them on our webstore and at most local retail stores.

Stores who resell our games are free to set their prices at whatever they wish, including below the level at which they can make a profit. As you noticed, many online stores compete on price and even among online stores you will see a wide range of prices on a given game.